Just lay it flat under you dog, wrap it around the and then clip the straps up around the neck of the legs. My dog is a 17lb bichon.

The straps and buckles look like they would be super durable, but a lot of th seams and stitching only gets the very edge of the straps. Couldn't even test it or try on because the straps were broken.

The seal belt attachment is just perfect. The leash is great as well and comfortable. The seat belt leash is awesome too! Comes with leash, harness, seatbelt tether strap and a velcro storage strap.

The quality of the harness is top notch. Seemed to have been used by others, repackaged and sent out again as new. Good price for the items.

It is very sturdy, but nicely padded. The clips are very sturdy. The latches are thick and sturdy. It is sturdy enough to withstand their weight and pull at times.